Actuating mechanism for pressing machines



May 19, 1931. E. DAVIS 1,805,569

ACTUATING MECHANISM FOR PRESSING MACHINES Original Filed Dec. 2, 1926 2 Sheets-Sheet l IN V EN TOR.

A TTORNEY$.

May 19, 1931. E. DAVIS ACTUATING MECHANISM FOR PRESSING MACHINES Original Filed Dec. 2, 1926 2 Sheets-Sheet 2 [a IN l EN TOR.

-W//u4 KM ATTORNEY5 Patented May 19, 1931 UNITED STATES.

PATENT OFFICE ERNEST DAVIS,"OF SYRACUSE, NEW YORK, ASSIGNOR TO THE PROSPERITY COMPANY INCL, OF SYRACUSE, NEW YORK, A CORPORATION OF NEW YORK ACTUATING MECHANISM FOR PRESSING MACHINES .Application filed December 2, 1926, Serial No 152,277. Renewed May'2, 1930.

This invention relates to pressing machines, particularly power operated pressing machines and has for its object a particularly simple and efiicient power or motor means controlled by the operator for initially opening or unlocking the press so that the completion of the opening movement can be effected by the counterweight, countersprings V or other means employed in this type of machine.

The invention consists in the novel features and in the combinations and constructions hereinafter set forth and claimed.

In describing this invention, reference is had to the accompanying drawings in which like characters designate corresponding parts in all the views.

Figure 1 is a side elevation, partly in section, of a pressing machine embodying my in- 2d vention, the machine being shown as in closed position. I

Figure 2 is a sectional View, partly in elevation, of the power mechanism for closing the press and the power mechanism for starting the opening of the press.

Figure 3 is a fragmentary detail view of a modified construction of my invention. ,-This pressing machine comprises, generally, cooperating pressing elements, one of which is movable toward and from the other, power actuated mechanism for actuating the movable element into closed or pressing position including means movable into position to lock the press closed, means as counterweights, countersprings etc., acting to open the press when the mechanism is unlocked and manually controlled power means for unlocking said mechanism. Insofar as the power mechanism for unlocking the press is concerned, the word manually is used in its broader sense in which it includes as an equivalent a pedally operated means or any operator-operated means.

The press here shown includes upper and lower pressing elements as a head 1 and a buck 2, the head being movable toward and from the buck 2, and the latter being mounted in any suitable manner on a frame 3. The

head 1 is carried at the forward end of a yoke 50 or lever 4 pivoted at 5 between its ends to a standard 6 rising from the frame and the power actuated mechanism in addition to this lever 4 includes motion transmitting parts which movev into a locked position or are locked in their position assumed when the press is closed and these parts are here shown as toggle links 8, 9 pivoted together at 10, the link 8 being pivoted at 11 to the rear arm of the lever 4 and the'link 9 pivoted at 12 to the base of the frame, the link 9 having aforwardly extending power arm 13 to which the motor to be presently described,is connected.

' A counterweight 14 acting on the rear arm of the lever 4 tends to open the pressf Also, a spring 15 acting to pull upwardly on the power arm 13 acts to open the press. In most instances, when the press is closed, the toggle links 8, 9 move into or beyond the dead center line of the toggle, and thus lock the press closed, but instead of moving into a dead center line, a lock or latch 16, Figure 3 which is pressed into locking position by a spring 17,

maybe used to lock the toggle in straightened position and hence lock the press closed.

The power actuator acting on the power arm 13 to close the press is here shown as a cylinder 18 and a piston 19 movable in the cylinder and connected by its rod 20 to the power arm 13. The piston 19 is single acting. The flow of motive fluid, as compressed air, to the cylinder is controlled through a valve mechanism requiring that two hands he used to close the press, although insofar as this invention is concerned, an operating mechanism including but one handle or pedal may be employed.

21 designates the feed line for a motive fluid as compressed air. The air is conducted from the feed line 21 through a coupling 22, valve casing 23, pipe 24 to the intake port 25 of the cylinder, and the flow of air from the pipe 21. through the valve casing 23 is controlled by a normally closed intake valve 26 connected by a stem 27 to a normally open exhaust valve 28. The pipe 24 leads .from the valve casing 23 between these valves. The valve 26 is held against its seat by a spring 29 and also by the air pressure, the spring thrusting against a perforated spring abutment 30 in the valve casing. Owing to the fact that the valves26 and 28 are connected by a stem 27, they act as a unit. They are erated by a manual as a push button 31 WhlCll acts upon a lever 32 pivoted at 33 to a suitable support 34 mounted on the frame of the machine, the lever 32 having an arm acting upon a second lever 35 which pushes a inst the stem 36 of the normally open ex 'aust valve 28. Obviously, when 'the button 31 is de ressed, the exhaust valve 28 will be close and the intake valve 26 opened so that air can pass from the feed pipe 21 through the valve casing 23,-

ipe 24 to the port 28, if an additional exaust valve to be presently described, is' held closed.

37 designates a normally open exhaust valve located in a valve casing 38 which is connect- ,ed by a ipe 39 to the ipe 24, this valve being operated to its close osition by a manual 40 similar to the push utton 31. Thus both push buttons 31 and 40 must be held deressed in order that air may enter the c lin- Ser 18 to actuate the piston 19 for 1f either hand is removed before the press is closed and locked as will be presently described, the air will exhaust out of the cylinder through either the exhaust valve 28 or 37, it dependin upon which handle 31 or 40 is released. means for unlocking the press so that 3 it can be opened by the counterweight and springs 14, 15 and 15", comprises a pressure operated motor connected to the feed pipe 21 and controlled by a handle grouped with one of the push buttons 31 or 40. As here shown, this fluid operated motor is a pressure chamber 41 connected by a pipe 42 to a valve casing 43 having a valve mechanism therein, the casing being connected by a pipe 44 to the feed pi 21. The valves in the casing 43 are simi ar to the valves in the casing 23,

and comprise a normally closed spring pressed intake valve 45 connected by a stem 46 to a normally open exhaust valve 47 so that these valves act as a unit, the valves being operated by a handle or lever 48 which is grouped with the push button 31 and which acts on the stem 49 of the valve 47. Obviouslg, as this handle 48 is operated, it will open t e intake valve permitting air to enter into 50 the pressure chamber 41 and when the handle 48 is released, the air will exhaust from the pressure chamber permitting the parts operated thereby to be restored to their startin osition.-

ithin the ressure chamber is a diaphragm49 whic acts on a push rod 50 which 1n turn acts on the toggle or the joint 10 thereof when the to la is straightened and the press closed. i fien the press is closed and the toggle is in straightened position, the

operator releases the push buttons 31 and 40- and the air exhausts from the cylinder 18 but the press remains closed as-the toggle is locked in straightened position. To open the press, it is merely necessary to operate the lever 48 1 ator' and to permit air to flow to the pressure chamber 41 so that it actuates the pusher 50 and moves the toggle out of the dead center line so that the counterweights and springs are free to act to open the press.

As seen in Figure 3,-the pressure chamber 51 may be arranged so that 1ts pusher 52 acts on the latch 16 to move the latch out of its locking position so that the counterweight and countersprings are free to open the press.

What I clalm is:

1. A pressing machine includingcooperating pressing elements, one of which is movable toward and from the other, power mechanism connected to the movable element for moving it into closed position includin a toggle movable into a straightened loc ed posltion, means tending to 0 en the press when the toggle is out of straightened position, a'single acting fluid motor connected to the toggle mechanism to move it into locked position, a feed pipe for supplying fluid to said motor, and manual means for controlling the flow of fluid to and from the'motor, an additional fluid motor and means operated thereby for coacting with the toggle mechanism when it is moved to its locked position and the press is closed, to control the initial movement of the to gle out of locked position, a pi e connecting the additional fluid motor to t e feed pipe, and a manually operable valve in the last mentioned feed pipe.

2. A pressing machine including cooperating pressing elements, one of which is movable toward and from the other, means tending to move the movable element, when unlocked, from closed position to open position,

a normally idle power actuator having a movable member, means for transmitting the movement of the movable actuator member to the movable pressing element and for locking the movable pressing element in its closed position independently of the actuator against the action of said means tending to openthe movable element, manual means for controllingethe actuation of the power actuing returnable automatically to its normal position when released, whereby when the manual means is released, the actuator is relieved of the actuating force, and a second, normally idle, manually controlled, power means acting on the second mentioned means to unlock the same whereby the ress is to open under the influence o the means tending to open it.

3. A pressm machine including cooperating-pressing e ements, one of which is movable toward and from the other, means tending to move the movable element, when unlocked, from closed position to open position, a normally idle, fluid pressure, power actuator including a movable member, means for transmitting the movement of the movable member to the movable pressing element and for locking the movable pressing element in its closed position independently of the actuator, against the action, of the means tending to open the movable element,

a feed pipe for a motive fluid, an intake and exhaust pipe connected to the actuator, manually operated valve means connecting said pipes for controlling the flow of motive fluid to and from the power actuator and normally arranged in a position to close the feed pipe and open the other pipe to the exhaust of the actuator and movable into position to open the feed pipe and being automatically returnable to its normal position when released and thereby closing the feed pipe and opening the other pipe to the exhaust and permitting the fluid to exhaust from the power actuator, a release, normally idle, fluid operated actuator including a movable member having means acting on the second mentioned means to unlock the press whereby the press opens under the influence of the means tending to open it, and .a manual for controlling the operation of the release actuator.

4. A pressing machine including cooper- 25 atingpressing elements, one of which is mov able toward and from the other, means tending to move the movable element, when unlocked, fromclosed position to open position, a normally idle, fluid pressure operated 3f) actuator having a movable member, means for transmitting the movement ofthe movable member to the movable pressing element and for locking the movable element in its closed position independently of the actuator against the action of the means tending to open the movable element, a feed pipe for a -motive fluid, an intake and exhaust pipe connected to the actuator, manually operated valve means connecting said pipes for con- 40 trolling the flow of motive fluid to and from the power actuator and normally arranged in position to close the feed pipe and open the other pipe to the exhaust and movable into position to open the feed pipe and close the other pipe to the exhaust of the actuator and automatically returnable to its normal osition when released thereby closing the eed pipe and openingthe other pipe to the exhaust from the power actuator, a release,

fluid operated actuator including a movable member having means acting .on the second.

7 mentioned means to unlock the same whereby the press is free to open under the influence of the means tending to open it, a pipe connectingthe release actuator to the feed pipe and manual valve means for controlling the release actuator comprising a normally closed valve having means tending to close it. 5. A pressing machine including cooperating pressing elements, one of which is movable toward and from the other,'means tend.- ing to move the movable .element when un'- locked from closed position to open pos1t1on, a normally idle power actuator, meansfor $5 transmitting the movement of the power actuator to the movable element and for locksecond, manually controlled, normally idle power means acting on the toggle to initially movethe toggle from locked position whereby the press is free to open under the influ- 'ence of the means tending to open it.

6. A pressing machine including cooperating pressing elements, one of which is movable toward'and from the other, means tending to move the movable element when unlocked, from closed position to open position, a'normally idle, single acting, fluid motor including a movable member, means for transmitting the movement of the movable motor member. to the movable pressing element and for locking the movable element in its closed position independently of the motor against the. action of the means tending to open it, a feed pipe for a motive fluid, a

pipe connected to the fluid motor and serving as an intake and exhaust pipe, manually operated intake and exhaust valve means connecting said pipes for controlling the flow of motive fluid to and from the motor, andnormally arranged in position to close the feed pipe and open the other pipe to the exhaust from the motor and movable by the operator into position to open the feed pipe and close the other pipe to the exhaust o the motor, and being automatically returnable to its normal position when released by the operator, thereby closing the feed pipe and opening the other pipe to the exhaust, an additional, single acting, normally idle, fluid motor having a movable member having means to act on the second mentioned means to unlock the same, a pipe connecting the additional, motor and the feed pipe, having valve means therein normall closing the last named pipe, and a manual or actuating the last mentioned valve means whereby when the last mentioned manual is operated, the

additional motor is actuated to unlock the press and permit the head to be opened by I the means tending to open it.

7. pressing machine including coopei' ating pressing elements, one of which is mov-- able toward and from the otherfmeans'tending to move the movable element when unlocked to open position, a motor including a movablemember, means for transmitting thev movement of themovable motor member to the the movable pressing element and for locking the mova sition independently of the motor, manual means which when operated causes the flow of 'power to the motor and when releasedcuts off the power to the motor and releases the motor and additional, normally idle, manually controlled means for actuating said second mentioned means to unlock the same whereby the means tending to open the press is free to act.

8. A pressing machine includin cooperating pressing elements, one of whic is movable toward and from the other, means tending to move the movable element when unlocked to open the press, a fluid motor in-- cluding a movable member, means for transmitting the movement of the movable motor member to the movable pressing element to close the press and for locking the press in c osed position independently of the motor against the action of the means tending to open the press, a feed pipe for sup lying a motive 'fluid to the motor, a second uid motor and mans operated thereby for unlocking the press whereby the means tending to open it is free to act, manually operated valve means forcontrolling the flow of fluid to and from the first ,fluid motor and normally arran d to 'ermit the fluid to exhaust from the rst flu1d motor and close the feed pipe to the passage of motive fluid to the motor and manual means 'for controlling the flow of fluid to the second fluid motor.

In testimony whereof, I have hereunto signed my name, at Syracuse, in the county 0 Onondaga and in the State of New York, this 29th day of September, 1926.

ERNEST DAVIS.

le element in closed po-' 

